It was as if two long lost brothers had been reunited. Audibly excited Microsoft CEO Satya Nadella and Salforce.com CEO Mark Benioff celebrated their strategic partnership in a joint conference call earlier this afternoon. Historically Microsoft and Salesforce.com have been bitter rivals, and Benioff an outspoken critic of Microsoft. But with Salesforce stock down over 20% in the last year, the company decided it was best to put their past behind them.

“We are excited to partner with salesforce.com and help customers thrive in a mobile and cloud-first world,” said Satya Nadella, CEO of Microsoft. “Working together we’ll deliver new solutions that connect the customer insights of Salesforce to the cloud productivity of Office 365, the cloud platform of Azure and the mobility of Windows, so our customers can do more.”

“Today is about putting the customer first,” said Marc Benioff, chairman and CEO, salesforce.com. “Together with Microsoft, we are building bridges that allow customers to be more productive.”

The deal largely revolves around integration between Windows Microsoft Azure and Salesforce.com. Nadella was in charge of Azure previous to being promoted CEO of the Redmond software giant.

The two companies committed to the following:

Salesforce1 for Windows and Windows Phone 8.1. Will enable customers to access Salesforce and run their business from their Windows devices. A preview is planned to be available in fall 2014 with general availability in 2015.

Salesforce for Office 365. New interoperability between Salesforce and Office 365 will give customers access to the content they need to collaborate, sell, service and market from virtually anywhere. Plans include the ability to:

Access, share, edit and collaborate on Office content from within Salesforce and on Salesforce1 using Office Mobile, Office for iPad and Office 365.

Use OneDrive for Business and SharePoint Online as integrated storage options for Salesforce.

Use Salesforce and Outlook together with a new Salesforce App for Outlook.

Connect Salesforce data to Excel and Power BI for Office 365 to visualize information and find new insights.